Alert archive / Virginia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 64, NWS Blacksburg, VA

May 19, 2017Alleghany County, Surry County, Wilkes County, North Carolina; 4 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at May 19, 2017, 2:20 PM EDT for Alleghany County, Surry County, Wilkes County, North Carolina; 4 counties in Virginia. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 19, 2017, 2:20 PM EDT (18:20 UTC)
Expired: May 19, 2017, 3:01 PM EDT
In force: 41 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Alleghany County, NC, Surry County, NC, Wilkes County, NC, Carroll County, VA, City of Galax, VA, Grayson County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 79 km from the middle of the area, began a volume at 18:24 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 19, 2:40 PM EDT	TSTM WND DMG	4 Nnw Mountain Park, NC	THUNDERSTORM WINDS DOWNED SEVERAL TREES NEAR THE INTERSECTION OF HAYSTACK ROAD AND LUFFMAN ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.3 hours before the alert went out and 94 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 341 J/kg
Mixed-layer CIN: -142 J/kg
Mixed-layer LCL: 864 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

194 
WUUS51 KRNK 191820
SVRRNK
NCC005-171-193-VAC035-077-141-640-191915-
/O.NEW.KRNK.SV.W.0064.170519T1820Z-170519T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
220 PM EDT FRI MAY 19 2017

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Eastern Alleghany County in northwestern North Carolina...
  Surry County in northwestern North Carolina...
  Northeastern Wilkes County in northwestern North Carolina...
  Southwestern Carroll County in southwestern Virginia...
  The City of Galax in southwestern Virginia...
  Southeastern Grayson County in southwestern Virginia...
  Southwestern Patrick County in southwestern Virginia...

* Until 315 PM EDT

* At 220 PM EDT, severe thunderstorms were located along a line
  extending from Galax to near Ennice to near Mc Grady, moving east
  at 10 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to trees and power lines. 

* Locations impacted include...
  Mount Airy...
  Galax...
  Elkin...
  Fairview...
  and Flat Rock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. For your
safety, move to an interior room on the lowest floor of a sturdy
building. Stay away from windows.

When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.

&&

LAT...LON 3633 8129 3651 8113 3668 8095 3663 8057
      3655 8036 3655 8044 3650 8044 3617 8098
TIME...MOT...LOC 1820Z 256DEG 11KT 3664 8090 3653 8105 3634 8117 

HAIL...1.00IN
WIND...60MPH
 
$$

PH

2 follow-up statements

420 
WWUS51 KRNK 191839
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
239 PM EDT FRI MAY 19 2017

VAC077-640-191849-
/O.CAN.KRNK.SV.W.0064.000000T0000Z-170519T1915Z/
City of Galax VA-Grayson VA-
239 PM EDT FRI MAY 19 2017

...THE SEVERE THUNDERSTORM WARNING FOR 
SOUTHEASTERN GRAYSON COUNTY AND THE CITY OF GALAX IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.

LAT...LON 3633 8129 3646 8107 3656 8095 3656 8084
      3661 8088 3664 8086 3663 8057 3655 8036
      3655 8044 3650 8044 3617 8098
TIME...MOT...LOC 1839Z 244DEG 24KT 3664 8083 3651 8086 3639 8112 

$$

NCC005-171-193-VAC035-141-191915-
/O.CON.KRNK.SV.W.0064.000000T0000Z-170519T1915Z/
Alleghany NC-Surry NC-Wilkes NC-Carroll VA-Patrick VA-
239 PM EDT FRI MAY 19 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT 
FOR EASTERN ALLEGHANY...SURRY AND NORTHEASTERN WILKES COUNTIES IN 
NORTHWESTERN NORTH CAROLINA...SOUTH CENTRAL CARROLL AND SOUTHWESTERN 
PATRICK COUNTIES IN SOUTHWESTERN VIRGINIA...

At 239 PM EDT, severe thunderstorms were located along a line
extending from Pipers Gap to Low Gap to Abshers, moving northeast at
30 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         trees and power lines. 

Locations impacted include...
Mount Airy...
Elkin...
Fairview...
Flat Rock...
and Dobson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for LARGE HAIL AND DAMAGING WINDS. For your
safety, move to an interior room on the lowest floor of a sturdy
building. Stay away from windows.

When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.

&&

LAT...LON 3633 8129 3646 8107 3656 8095 3656 8084
      3661 8088 3664 8086 3663 8057 3655 8036
      3655 8044 3650 8044 3617 8098
TIME...MOT...LOC 1839Z 244DEG 24KT 3664 8083 3651 8086 3639 8112 

HAIL...1.00IN
WIND...60MPH
 
$$

PH

761 
WWUS51 KRNK 191901
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
301 PM EDT FRI MAY 19 2017

NCC005-171-193-VAC035-141-191911-
/O.CAN.KRNK.SV.W.0064.000000T0000Z-170519T1915Z/
Alleghany NC-Surry NC-Wilkes NC-Carroll VA-Patrick VA-
301 PM EDT FRI MAY 19 2017

...THE SEVERE THUNDERSTORM WARNING FOR 
EASTERN ALLEGHANY...SURRY AND NORTHEASTERN WILKES COUNTIES IN
NORTHWESTERN NORTH CAROLINA...SOUTH CENTRAL CARROLL AND SOUTHWESTERN
PATRICK COUNTIES IN SOUTHWESTERN VIRGINIA IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning has been cancelled.  However heavy rain is
still possible with these thunderstorms.

When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.

LAT...LON 3633 8129 3646 8107 3656 8095 3656 8084
      3661 8088 3664 8086 3663 8057 3655 8036
      3655 8044 3650 8044 3617 8098
TIME...MOT...LOC 1858Z 256DEG 11KT 3665 8076 3652 8079 3640 8105 

$$

PH

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 18, 8:17 PM EDT	Special Weather Statement	RNK	Stokes, Surry	58 min
May 19, 12:57 PM EDT	Special Weather Statement	RNK	Ashe	48 min
May 19, 1:07 PM EDT	Special Weather Statement	RNK	Watauga	53 min
May 19, 1:15 PM EDT	Severe Thunderstorm Warning	RNK	Watauga	42 min
May 19, 1:29 PM EDT	Special Weather Statement	RNK	Surry	61 min
May 19, 1:50 PM EDT	Severe Thunderstorm Warning	RNK	Surry	25 min
May 19, 1:59 PM EDT	Special Weather Statement	RNK	Alleghany	61 min
May 19, 2:41 PM EDT	Special Weather Statement	RNK	Wilkes	49 min
May 19, 2:56 PM EDT	Special Weather Statement	RNK	Yadkin	64 min
May 19, 3:00 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry, Wilkes, Yadkin	60 min
May 19, 3:07 PM EDT	Special Weather Statement	RNK	Rockingham	53 min
May 19, 3:57 PM EDT	Special Weather Statement	RNK	Stokes	33 min
May 19, 4:05 PM EDT	Special Weather Statement	RNK	Caswell	55 min
May 19, 4:08 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	67 min
May 19, 7:59 PM EDT	Special Weather Statement	RNK	Ashe	31 min
May 19, 10:45 AM EDT	Special Weather Statement	RNK	Floyd	30 min
May 19, 11:25 AM EDT	Special Weather Statement	RNK	Franklin	35 min
May 19, 12:03 PM EDT	Special Weather Statement	RNK	Franklin	42 min
May 19, 12:08 PM EDT	Special Weather Statement	RNK	Henry	52 min
May 19, 12:27 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Pittsylvania	63 min
May 19, 12:29 PM EDT	Special Weather Statement	RNK	Bedford	61 min
May 19, 12:36 PM EDT	Severe Thunderstorm Warning	RNK	Henry, City of Martinsville	34 min
May 19, 12:40 PM EDT	Special Weather Statement	RNK	Carroll	65 min
May 19, 12:43 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	47 min
May 19, 1:11 PM EDT	Special Weather Statement	RNK	Prince Edward	19 min
May 19, 1:20 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Patrick	55 min
May 19, 1:25 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Bedford, Campbell, Charlotte, Halifax, Pittsylvania	65 min
May 19, 1:43 PM EDT	Special Weather Statement	RNK	Wythe	62 min
May 19, 2:05 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Patrick, City of Martinsville	55 min
May 19, 2:35 PM EDT	Special Weather Statement	RNK	Bedford	40 min
May 19, 3:04 PM EDT	Special Weather Statement	RNK	Carroll, Patrick, City of Galax	56 min
May 19, 3:23 PM EDT	Special Weather Statement	RNK	Franklin	52 min
May 19, 3:32 PM EDT	Special Weather Statement	RNK	Franklin	28 min
May 19, 4:10 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania	65 min
May 19, 4:28 PM EDT	Special Weather Statement	RNK	Halifax	32 min
May 19, 4:47 PM EDT	Severe Thunderstorm Warning	RNK	Halifax	28 min
May 19, 5:08 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax	49 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2017 Severe Thunderstorm Warnings in North Carolina, 2017 Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.